HAVE A SEAT: ONLY $50,000

Everything from a Marcel Breuer-designed chaise longue to dinner in a famous house will be offered at a June 6 benefit auction sponsored by the Illinois Institute of Technology`s Institute of Design.

The event will honor the memory of the late Lazlo Moholy-Nagy, founder of the Institute of Design. Proceeds will help fund scholarships to the institute, which descended from the American Bauhaus movement.

The aluminum-framed chaise by Breuer, a rare prototype, is valued at more than $50,000. High bidders on the dinner excursions will be flown in private airplanes to Frank Lloyd Wright`s Meyer May Home in Grand Rapids, Mich., and to a Harbor Springs, Mich., residence designed by Richard Meier.

Other auction items include sketches by Mies van der Rohe, a Bauhaus-inspired Viennese settee, a portfolio of Hedrich-Blessing photographs, an ink-and-gouache composition by Serge Chermayeff, and a Bang & Olufsen sound center.

A dinner will be held in tandem with the auction in Crown Hall on the IIT campus. For information about buying $150-per-person tickets and bidding procedures, call LaDonna Whitmer at 312-567-5988.

Other architectural news:

- Several Frank Lloyd Wright-related events, all requiring paid admissions, are coming up. The richest, perhaps, is the May 19 Wright Plus housewalk in which the interiors of 10 historic Oak Park houses, five by Wright, will be on view. Call 708-848-1976. The Frederick Law Olmsted Society`s May 20 housewalk in Riverside will feature six residences, including one by Wright. Call 708-457-6929.

In Spring Green, Wis., Wright`s 1902 Prairie-style Hillside School is open for guided tours through Oct. 28. Summer tours of the entire Taliesin grounds, on which the school and Wright`s former home and studio stand, will begin June 13. For details on both tours, call 608-588-2511.

- Guided tours of the Historic Pullman District begin Sunday and will be held every first Sunday of the month through October. Lunch at the old Florence Hotel is an option. The famous company town where railroad passenger cars were manufactured has a visitors center at 614 E. 113th St., and the phone number is 312-785-8181.

- Outstanding product and graphic designs and design concepts are presented in an exhibition running through June 13 at the Museum of Science and Industry. Items ranging from a foldable bicycle and inflatable shoes to leather bags and a malaria test kit are on view, along with architectural interiors and high-tech equipment. All were selected by a jury for